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Scalus

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To get started with Scalus, see:

• Scalus website
• Getting started guide
• GitHub repository

Scalus lets you build a complete Cardano DApp in one language, Scala 3: the validators, the off-chain code, and the tests. Validators compile to Plutus Core (UPLC) and run on Cardano like scripts written in any other language.

Because everything is Scala, you write contract logic once and reuse it on-chain, in JVM backend services, and in the browser. Data types are shared too, so on-chain and off-chain code stay in sync.

What Scalus includes

• An optimizing compiler. Scalus optimizes the UPLC it generates to reduce script size and execution costs. You can choose how data types are represented on-chain: as Plutus Data or as sums of products (SoP).
• An emulator. An in-memory Cardano node that validates each transaction against the Cardano ledger rules. It runs on the JVM and in JavaScript and TypeScript, and works as a provider for MeshJS and Lucid Evolution.
• Testing tools. Write unit tests, property-based tests, and scenario tests that explore many sequences of transactions and report the sequence that breaks your contract. Run integration tests against a local Yaci DevKit network.
• A transaction builder with a Blockfrost provider for public networks.
• A Plutus script evaluator for JavaScript and TypeScript. It calculates execution costs off-chain. Yaci DevKit uses it as its default transaction evaluator.

Scalus supports Plutus V1, V2, and V3 scripts and generates CIP-57 blueprints.